Hundreds of notifications when a shared video is played in the browser

[melyux]

Steps to reproduce

1. Enable public link download notifications
2. Upload an iPhone video to Nextcloud, so that it ends up with the .mov extension. Share it via public link
3. Go to the public link
4. Play the video
5. Look at all the notifications and have an aneurysm

Expected behaviour

A single notification should be sent, or maybe one when the user visits and another one when they actually download the file

Actual behaviour

I get a notification that the file is being downloaded when I visit the link, then immediately another notification that just says “Nextcloud notification”, and then another one that the file is being downloaded. All before playing the video.

Once you press the play button... I start getting about 20 notifications a second, some of them saying the file is being downloaded and others just saying “Nextcloud notification” for some reason.

Server configuration

Operating system: Linux (Docker)

Web server: Not sure

Database: MySQL (MariaDB) 10.5.5

PHP version: 7.3.2.3

Nextcloud version: (see Nextcloud admin page) 20.0.0

Where did you install Nextcloud from: Docker

Signing status:

No errors have been found.

List of activated apps:

Enabled:
  - activity: 2.13.1
  - bruteforcesettings: 2.0.1
  - cloud_federation_api: 1.3.0
  - comments: 1.10.0
  - contactsinteraction: 1.1.0
  - dav: 1.16.0
  - federatedfilesharing: 1.10.1
  - files: 1.15.0
  - files_downloadactivity: 1.9.0
  - files_external: 1.11.1
  - files_pdfviewer: 2.0.1
  - files_rightclick: 0.17.0
  - files_sharing: 1.12.0
  - files_trashbin: 1.10.1
  - files_versions: 1.13.0
  - files_videoplayer: 1.9.0
  - logreader: 2.5.0
  - lookup_server_connector: 1.8.0
  - notes: 4.0.0
  - notifications: 2.8.0
  - oauth2: 1.8.0
  - password_policy: 1.10.1
  - photos: 1.2.0
  - provisioning_api: 1.10.0
  - serverinfo: 1.10.0
  - settings: 1.2.0
  - text: 3.1.0
  - theming: 1.11.0
  - twofactor_backupcodes: 1.9.0
  - twofactor_nextcloud_notification: 3.0.0
  - twofactor_totp: 5.0.0
  - updatenotification: 1.10.0
  - user_status: 1.0.0
  - viewer: 1.4.0
  - workflowengine: 2.2.0
Disabled:
  - accessibility
  - admin_audit
  - dashboard
  - encryption
  - federation
  - firstrunwizard
  - nextcloud_announcements
  - privacy
  - recommendations
  - sharebymail
  - support
  - survey_client
  - systemtags
  - tasks
  - user_ldap
  - weather_status

Nextcloud configuration:

{
    "system": {
        "memcache.local": "\\OC\\Memcache\\APCu",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "nextcloud.***.com"
        ],
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "20.0.0.9",
        "overwrite.cli.url": "https:\/\/nextcloud.***.com",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "maintenance": false,
        "twofactor_enforced": "false",
        "twofactor_enforced_groups": [],
        "twofactor_enforced_excluded_groups": [],
        "updater.secret": "***REMOVED SENSITIVE VALUE***",
        "theme": "",
        "loglevel": 2,
        "updater.release.channel": "stable"
    },
    "apps": {
        "accessibility": {
            "enabled": "no",
            "installed_version": "1.2.0",
            "types": ""
        },
        "activity": {
            "enable_email": "no",
            "enabled": "yes",
            "installed_version": "2.13.1",
            "types": "filesystem"
        },
        "backgroundjob": {
            "lastjob": "1982"
        },
        "bruteForce": {
            "whitelist_1": "*.*.*.*\/0"
        },
        "bruteforcesettings": {
            "enabled": "yes",
            "installed_version": "2.0.1",
            "types": ""
        },
        "cloud_federation_api": {
            "enabled": "yes",
            "installed_version": "1.3.0",
            "types": "filesystem"
        },
        "comments": {
            "enabled": "yes",
            "installed_version": "1.10.0",
            "types": "logging"
        },
        "contactsinteraction": {
            "enabled": "yes",
            "installed_version": "1.1.0",
            "types": "dav"
        },
        "core": {
            "backgroundjobs_mode": "cron",
            "enterpriseLogoChecked": "yes",
            "installed.bundles": "[\"CoreBundle\"]",
            "installedat": "1568505563.6541",
            "lastcron": "1602817500",
            "lastupdateResult": "[]",
            "lastupdatedat": "1602816663",
            "oc.integritycheck.checker": "[]",
            "public_files": "files_sharing\/public.php",
            "public_webdav": "dav\/appinfo\/v1\/publicwebdav.php",
            "shareapi_exclude_groups": "no",
            "shareapi_exclude_groups_list": "[\"\"]",
            "shareapi_only_share_with_group_members": "no",
            "theming.variables": "f2b95d7611988ad39c523e206a9126ac",
            "updater.secret.created": "1602789790",
            "vendor": "nextcloud"
        },
        "dashboard": {
            "enabled": "no",
            "installed_version": "7.0.0",
            "types": ""
        },
        "dav": {
            "buildCalendarReminderIndex": "yes",
            "buildCalendarSearchIndex": "yes",
            "chunks_migrated": "1",
            "enabled": "yes",
            "installed_version": "1.16.0",
            "regeneratedBirthdayCalendarsForYearFix": "yes",
            "types": "filesystem"
        },
        "deck": {
            "enabled": "no",
            "installed_version": "0.6.6",
            "types": "dav"
        },
        "federatedfilesharing": {
            "enabled": "yes",
            "installed_version": "1.10.1",
            "types": ""
        },
        "federation": {
            "enabled": "no",
            "installed_version": "1.6.0",
            "types": "authentication"
        },
        "files": {
            "cronjob_scan_files": "500",
            "enabled": "yes",
            "installed_version": "1.15.0",
            "types": "filesystem"
        },
        "files_downloadactivity": {
            "enabled": "yes",
            "installed_version": "1.9.0",
            "types": "filesystem"
        },
        "files_external": {
            "enabled": "yes",
            "installed_version": "1.11.1",
            "types": "filesystem"
        },
        "files_pdfviewer": {
            "enabled": "yes",
            "installed_version": "2.0.1",
            "types": ""
        },
        "files_rightclick": {
            "enabled": "yes",
            "installed_version": "0.17.0",
            "types": ""
        },
        "files_sharing": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": "filesystem"
        },
        "files_texteditor": {
            "enabled": "no",
            "installed_version": "2.14.0",
            "types": ""
        },
        "files_trackdownloads": {
            "enabled": "no",
            "installed_version": "1.9.0",
            "types": "filesystem"
        },
        "files_trashbin": {
            "enabled": "yes",
            "installed_version": "1.10.1",
            "types": "filesystem,dav"
        },
        "files_versions": {
            "enabled": "yes",
            "installed_version": "1.13.0",
            "types": "filesystem,dav"
        },
        "files_videoplayer": {
            "enabled": "yes",
            "installed_version": "1.9.0",
            "types": ""
        },
        "firstrunwizard": {
            "enabled": "no",
            "installed_version": "2.5.0",
            "types": "logging"
        },
        "gallery": {
            "enabled": "no",
            "installed_version": "18.4.0",
            "types": ""
        },
        "logreader": {
            "enabled": "yes",
            "installed_version": "2.5.0",
            "types": ""
        },
        "lookup_server_connector": {
            "enabled": "yes",
            "installed_version": "1.8.0",
            "types": "authentication"
        },
        "nextcloud_announcements": {
            "enabled": "no",
            "installed_version": "1.5.0",
            "pub_date": "Mon, 02 Sep 2019 00:00:00 +0200",
            "types": "logging"
        },
        "notes": {
            "enabled": "yes",
            "installed_version": "4.0.0",
            "types": ""
        },
        "notifications": {
            "enabled": "yes",
            "installed_version": "2.8.0",
            "types": "logging"
        },
        "oauth2": {
            "enabled": "yes",
            "installed_version": "1.8.0",
            "types": "authentication"
        },
        "password_policy": {
            "enabled": "yes",
            "installed_version": "1.10.1",
            "types": "authentication"
        },
        "photos": {
            "enabled": "yes",
            "installed_version": "1.2.0",
            "types": ""
        },
        "privacy": {
            "enabled": "no",
            "installed_version": "1.0.0",
            "types": ""
        },
        "provisioning_api": {
            "enabled": "yes",
            "installed_version": "1.10.0",
            "types": "prevent_group_restriction"
        },
        "recommendations": {
            "enabled": "no",
            "installed_version": "0.4.0",
            "types": ""
        },
        "serverinfo": {
            "enabled": "yes",
            "installed_version": "1.10.0",
            "types": ""
        },
        "settings": {
            "enabled": "yes",
            "installed_version": "1.2.0",
            "types": ""
        },
        "sharebymail": {
            "enabled": "no",
            "installed_version": "1.6.0",
            "types": "filesystem"
        },
        "spreed": {
            "enabled": "no",
            "installed_version": "6.0.4",
            "signaling_ticket_secret": "***REMOVED SENSITIVE VALUE***",
            "stun_servers": "***REMOVED SENSITIVE VALUE***",
            "types": "prevent_group_restriction"
        },
        "support": {
            "enabled": "no",
            "installed_version": "1.0.0",
            "types": ""
        },
        "survey_client": {
            "enabled": "no",
            "installed_version": "1.4.0",
            "types": ""
        },
        "systemtags": {
            "enabled": "no",
            "installed_version": "1.6.0",
            "types": "logging"
        },
        "tasks": {
            "enabled": "no",
            "installed_version": "0.13.4",
            "types": ""
        },
        "text": {
            "enabled": "yes",
            "installed_version": "3.1.0",
            "types": "dav"
        },
        "theming": {
            "cachebuster": "18",
            "color": "#0098EB",
            "enabled": "yes",
            "faviconMime": "image\/png",
            "installed_version": "1.11.0",
            "logoMime": "image\/png",
            "logoheaderMime": "image\/png",
            "name": "\u00fc",
            "slogan": "***REMOVED SENSITIVE VALUE***",
            "types": "logging",
            "url": "***REMOVED SENSITIVE VALUE***"
        },
        "twofactor_backupcodes": {
            "enabled": "yes",
            "installed_version": "1.9.0",
            "types": ""
        },
        "twofactor_nextcloud_notification": {
            "enabled": "yes",
            "installed_version": "3.0.0",
            "***_enabled": "1",
            "***_enabled": "1",
            "***": ""
        },
        "twofactor_totp": {
            "enabled": "yes",
            "installed_version": "5.0.0",
            "types": ""
        },
        "updatenotification": {
            "core": "18.0.10.2",
            "enabled": "yes",
            "files_rightclick": "0.15.1",
            "installed_version": "1.10.0",
            "types": "",
            "update_check_errors": "0"
        },
        "uploaddetails": {
            "enabled": "no",
            "installed_version": "0.1.3",
            "types": ""
        },
        "user_status": {
            "enabled": "yes",
            "installed_version": "1.0.0",
            "types": ""
        },
        "viewer": {
            "enabled": "yes",
            "installed_version": "1.4.0",
            "types": ""
        },
        "weather_status": {
            "enabled": "no",
            "installed_version": "1.0.0",
            "types": ""
        },
        "workflowengine": {
            "enabled": "yes",
            "installed_version": "2.2.0",
            "types": "filesystem"
        }
    }
}

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...

Client configuration

Browser: All

Operating system: All

Logs

Nextcloud log (data/nextcloud.log)

No new messages when this happens

Browser log